信息 ：org.apache.tomcat.util.http.Parameters [DirectJDKLog.java : 173] Character decoding failed. Parameter [param] with value [] has been ignored. Note that the name and value quoted here may be corrupted due to the failed decoding. Use debug level logging to see the original, non-corrupted values.
Note: further occurrences of Parameter errors will be logged at DEBUG level.
原因 ：http接口請求，攜帶參數中含有%, 編碼出錯，導致數據傳輸為空。
解決 ：param.replaceAll("%" , "%25");
補充 ：
1.當發送參數數據類型為 "Content-Type", "application/x-www-form-urlencoded" 會出現此問題
2.當發送參數類型為 "Content-Type", "application/json" 接口使用@RequestBody接收入參 可以避免